/Engine/Source/Editor/StaticMeshEditor/Public/StaticMeshEditorSubsystem.h
Set the LOD reduction for the specified LOD index.
void SetLodReductionSettings ( [UStaticMesh](API\Runtime\Engine\Engine\UStaticMesh) * StaticMesh, const int32 LodIndex, const [FMeshReductionSettings](API\Runtime\Engine\Engine\FMeshReductionSettings) & ReductionOptions )